To make predictions or generate reasons, background knowledge is essential. A simple way to supplement that knowledge is utilizing plain texts from natural language databases, e.g. Wikipedia. Intuitively, for a specific given statement, plain texts can be provided by searching similar sentences in the database. In other words, each evidence sentences contain the keywords of the given statement. This method is used in some of the state-of-the-art models [1]}. However, for the purpose of explaining the reason, evidence which has similar wording with the given statement may lack information, and sometimes can be misleading when the given statement does not make sense.
